package com.starsky.config;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.service.*;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spi.service.contexts.SecurityContext;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

import java.util.ArrayList;
import java.util.List;

/**
 * Swagger2的接口配置
 *
 * @author kyson
 */
@Configuration
@EnableSwagger2
public class SwaggerConfig {
    /**
     * token通过Authorization头请求头传递
     */
    private static final String NAME = "Authorization";
    private static final String KEY_NAME = "Authorization";
    private static final String PASSAS = "header";

    /**
     * 默认的安全上引用
     */
    private static final String SCOPE = "global";
    private static final String DESCRIPTION = "accessEverything";
    //安全上下文
    private static final String PATH_REGEX = "^(?!auth).*$";

    /**
     * 系统基础配置
     */
    @Autowired
    private SailingConfig sialingConfig;

    /**
     * 创建API
     */
    @Bean
    public Docket createRestApi() {
        return new Docket(DocumentationType.SWAGGER_2)
                // 是否启用Swagger
                .enable(true)
                // 用来创建该API的基本信息，展示在文档的页面中（自定义展示的信息）
                .apiInfo(apiInfo())
                // 设置哪些接口暴露给Swagger展示
                .select()
                // 扫描所有有注解的api，用这种方式更灵活
//                .apis(RequestHandlerSelectors.withMethodAnnotation(ApiOperation.class))
                .apis(RequestHandlerSelectors.basePackage(sialingConfig.getPackageName()))
                // 扫描指定包中的swagger注解
                // 扫描所有 .apis(RequestHandlerSelectors.any())
                .paths(PathSelectors.any())
                .build();
                /* 设置安全模式，swagger可以设置访问token */
//                .securitySchemes(securitySchemes())
//                .securityContexts(securityContexts());
//                .pathMapping(pathMapping);
    }


    /**
     * 添加摘要信息
     */
    private ApiInfo apiInfo() {
        // 用ApiInfoBuilder进行定制
        return new ApiInfoBuilder()
                // 设置标题
                .title(sialingConfig.getTitle())
                // 描述
                .description(sialingConfig.getDescription())
                // 作者信息
                .contact(new Contact(sialingConfig.getName(), sialingConfig.getUrl(), sialingConfig.getEmail()))
                // 版本
                .version(sialingConfig.getVersion())
                .build();
    }

    /**
     * 安全模式，这里指定token通过Authorization头请求头传递
     */
    private List<ApiKey> securitySchemes() {
        List<ApiKey> apiKeyList = new ArrayList<ApiKey>();
        apiKeyList.add(new ApiKey(NAME, KEY_NAME, PASSAS));
        return apiKeyList;
    }

    /**
     * 安全上下文
     */
    private List<SecurityContext> securityContexts() {
        List<SecurityContext> securityContexts = new ArrayList<>();
        securityContexts.add(
                SecurityContext.builder()
                        .securityReferences(defaultAuth())
                        .forPaths(PathSelectors.regex(PATH_REGEX))
                        .build());
        return securityContexts;
    }

    /**
     * 默认的安全上引用
     */
    private List<SecurityReference> defaultAuth() {
        AuthorizationScope authorizationScope = new AuthorizationScope(SCOPE, DESCRIPTION);
        AuthorizationScope[] authorizationScopes = new AuthorizationScope[1];
        authorizationScopes[0] = authorizationScope;
        List<SecurityReference> securityReferences = new ArrayList<>();
        securityReferences.add(new SecurityReference(NAME, authorizationScopes));
        return securityReferences;
    }

}
